Twisted auger.



No. 703,576. Patented July I, I902.

G. HALLENSCHEID. I

TWISTED AUGEB.

, (Application filed-Aug. a, 1901'.)

(No Model.)

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km; @W Maw UNITED STATES PATENT OFFICE;

GUSTAV HALLENSCHEID, OF RONSDORF, GERMANY.

TWISTED AUGER.

SPECIFICATION forming part of Letters Patent N 0. 703,576, dated July 1, 1902. Application filed August 8, 1901- 7 Serial No. 71,357- (No model.)

To all' whom it may concern.-

Be it known that I, GUSTAV HALLENscHnID, a subject of the King of Prussia, Emperor of Germany, and a resident at Ronsdorf, in the Kingdom of Prussia, Germany, have invented new and useful Improvements in Twisted Augers, of which the following is a specification.

The subject of my present invention is a twisted auger which distinguishes itself from other angers of like nature in that its screwthread is disposed eccentrically to the cutting edge, whereby there is obtained this advantage that the hole is larger than the diameter of the auger.

The auger is represented in the accompanying drawing.

The construction is as follows: The shaft a runs out into a flat bar 5, which is twisted ,into the form of a screw the width of which corresponds to that of the cutting edge 0 measured from the axis of the screw (1. The

edge e of the bar b is formed into a screw d and the edge f into a cutter g of any desired shape, and between the two the bar bis formed into a cutting edge 0, which may be disposed at any desired angle to the axis of the screw 01.

Having thus described my invention, what Iclaim is- A twisted auger with sore w-thread disposed eccentrically to the cutting edge and characterized by having the edge e of the worm I) 

